The SP6642/6643 devices are high-efficiency, low-power step-up DC-DC converters for +1V inputs ideal for single alkaline cell applications such as pagers, remote controls, pointing devices and other low-power portable products. This application note is for users like medical devices, emergency lighting and others who need twice the output current than the datasheet specified values for the SP6642/6643. Typically specified at 20mA for 3.3V out with a 1.2V input, the SP6642 can actually output double the current if a lower value of inductor is selected. SP6642/6643 Applications Schematic 47H Inductor